07288 A PROPOSED PROTOCOL FOR CLASSSIFYING CORROSION DAMAGED PRESTRESSED CONCRETE PILINGS ON COASTAL

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Product Number: 51300-07288-SG

ISBN: 07288 2007 CP

Author: William H. Hartt, William T. Scannell, David B. Thompson, Ivan Lasa, and Donald Buwalda

Publication Date: 2007

Industry: Highways & Bridges

Member Price: $0.00

Non Member Price: $20.00

Price: $20.00

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Corrosion induced cracking, delamination, and spalling of prestressed coastal bridge pilings presents a formidable challenge to maintenance and maintenance planning, both in Florida and elsewhere. Particularly needed is a protocol whereby engineers can prioritize corrosion damaged pilings according to deterioration severity and reduced load bearing capacity. In this project, ten pilings on six coastal bridges were inspected; and the dimensions of concrete cracks, delaminations, and spalls were measured. These then served as input to a Priority Ranking equation that was formulated to yield a quantitative number (PR) that is intended to reflect loss of piling load bearing capacity. The same inspection and analysis was also performed for ten pilings from the old St. George Island Bridge. Subsequent to an on-site inspection, the latter pilings were recovered and tested to failure as part of another project. The PR value for the 20 pilings was compared with load capacity analysis results determined using FB-MultiPier and the Florida Department of Transportation Biaxial Column Program software and, in the case of the St. George Island Bridge, experimental strength determinations.